#ifndef __M_BROKER_H__
#define __M_BROKER_H__

#include "muduo/proto/codec.h"
#include "muduo/proto/dispatcher.h"
#include "muduo/base/Logging.h"
#include "muduo/base/Mutex.h"
#include "muduo/net/EventLoop.h"
#include "muduo/net/TcpServer.h"

#include "../mqcommon/mq_threadpool.hpp"
#include "../mqcommon/mq_msg.pb.h"
#include "../mqcommon/mq_proto.pb.h"
#include "../mqcommon/mq_logger.hpp"
#include "mq_connection.hpp"
#include "mq_consumer.hpp"
#include "mq_host.hpp"

namespace zkpmq {
    #define DBFILE "/meta.db"
    #define HOSTNAME "MyVirtualHost"
    class Server {
    public:
        typedef std::shared_ptr<google::protobuf::Message> MessagePtr;
        Server(int port, const std::string &basedir): _server(&_baseloop, muduo::net::InetAddress("0.0.0.0", port), 
            "Server", muduo::net::TcpServer::kReusePort),
            _dispatcher(std::bind(&Server::onUnknownMessage, this, std::placeholders::_1, 
                std::placeholders::_2, std::placeholders::_3)),
            _codec(std::make_shared<ProtobufCodec>(std::bind(&ProtobufDispatcher::onProtobufMessage, &_dispatcher, 
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3))),
            _virtual_host(std::make_shared<VirtualHost>(HOSTNAME, basedir, basedir + DBFILE)),
            _consumer_manager(std::make_shared<ConsumerManager>()),
            _connection_manager(std::make_shared<ConnectionManager>()),
            _threadpool(std::make_shared<threadpool>()) {
            // 针对历史消息中的所有队列，别忘了，初始队列的消费者管理结构
            QueueMap qm = _virtual_host->allQueues();
            for (auto &q : qm) {
                _consumer_manager->initQueueConsumer(q.first);
            }
            // 注册业务请求处理函数
            _dispatcher.registerMessageCallback<zkpmq::openChannelRequest>(std::bind(&Server::onOpenChannel, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::closeChannelRequest>(std::bind(&Server::onCloseChannel, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::declareExchangeRequest>(std::bind(&Server::onDeclareExchange, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::deleteExchangeRequest>(std::bind(&Server::onDeleteExchange, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::declareQueueRequest>(std::bind(&Server::onDeclareQueue, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::deleteQueueRequest>(std::bind(&Server::onDeleteQueue, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::queueBindRequest>(std::bind(&Server::onQueueBind, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::queueUnBindRequest>(std::bind(&Server::onQueueUnBind, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::basicPublishRequest>(std::bind(&Server::onBasicPublish, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::basicAckRequest>(std::bind(&Server::onBasicAck, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::basicConsumeRequest>(std::bind(&Server::onBasicConsume, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zkpmq::basicCancelRequest>(std::bind(&Server::onBasicCancel, this,
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _server.setMessageCallback(std::bind(&ProtobufCodec::onMessage, _codec.get(),
                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _server.setConnectionCallback(std::bind(&Server::onConnection, this, std::placeholders::_1));
        }
        void start() {
            _server.start();
            _baseloop.loop();
        }

    private:
        // 打开信道
        void onOpenChannel(const muduo::net::TcpConnectionPtr& conn, const openChannelRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("打开信道时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            return mconn->openChannel(message);
        }
        // 关闭信道
        void onCloseChannel(const muduo::net::TcpConnectionPtr& conn, const closeChannelRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("关闭信道时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            return mconn->closeChannel(message);
        }
        // 声明交换机
        void onDeclareExchange(const muduo::net::TcpConnectionPtr& conn, const declareExchangeRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("声明交换机时时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("声明交换机时时，没有找到信道！");
                return;
            }
            return cp->declareExchange(message);
        }
        // 删除交换机
        void onDeleteExchange(const muduo::net::TcpConnectionPtr& conn, const deleteExchangeRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("删除交换机时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("删除交换机时，没有找到信道！");
                return;
            }
            return cp->deleteExchange(message);
        }
        // 声明队列
        void onDeclareQueue(const muduo::net::TcpConnectionPtr& conn, const declareQueueRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("声明队列时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("声明队列时，没有找到信道！");
                return;
            }
            return cp->declareQueue(message);
        }
        // 删除队列
        void onDeleteQueue(const muduo::net::TcpConnectionPtr& conn, const deleteQueueRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("删除队列时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("删除队列时，没有找到信道！");
                return;
            }
            return cp->deleteQueue(message);
        }
        // 队列绑定
        void onQueueBind(const muduo::net::TcpConnectionPtr& conn, const queueBindRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("队列绑定时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("队列绑定时，没有找到信道！");
                return;
            }
            return cp->queueBind(message);
        }
        // 队列解绑
        void onQueueUnBind(const muduo::net::TcpConnectionPtr& conn, const queueUnBindRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("队列解绑时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("队列解绑时，没有找到信道！");
                return;
            }
            return cp->queueUnBind(message);
        }
        // 消息发布
        void onBasicPublish(const muduo::net::TcpConnectionPtr& conn, const basicPublishRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("发布消息时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("发布消息时，没有找到信道！");
                return;
            }
            return cp->basicPublish(message);
        }
        // 消息确认
        void onBasicAck(const muduo::net::TcpConnectionPtr& conn, const basicAckRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("确认消息时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("确认消息时，没有找到信道！");
                return;
            }
            return cp->basicAck(message);
        }
        // 队列消息订阅
        void onBasicConsume(const muduo::net::TcpConnectionPtr& conn, const basicConsumeRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("队列消息订阅时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("队列消息订阅时，没有找到信道！");
                return;
            }
            return cp->basicConsume(message);
        }
        // 队列消息取消订阅
        void onBasicCancel(const muduo::net::TcpConnectionPtr& conn, const basicCancelRequestPtr& message, muduo::Timestamp) {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr) {
                DLOG("队列消息取消订阅时，没有找到连接对应的 Connection 对象！");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(message->cid());
            if (cp.get() == nullptr) {
                DLOG("队列消息取消订阅时，没有找到信道！");
                return;
            }
            return cp->basicCancel(message);
        }

        void onUnknownMessage(const muduo::net::TcpConnectionPtr& conn, const MessagePtr& message, muduo::Timestamp) {
            LOG_INFO << "onUnknownMessage: " << message->GetTypeName();
            conn->shutdown();
        }
        void onConnection(const muduo::net::TcpConnectionPtr& conn) {
            if (conn->connected()) {
                _connection_manager->newConnection(_virtual_host, _consumer_manager, _codec, conn, _threadpool);
            } else {
                _connection_manager->delConnection(conn);
            }
        }

    private:
        muduo::net::EventLoop _baseloop;
        muduo::net::TcpServer _server;
        ProtobufDispatcher _dispatcher; // 请求分发器对象 -- 要向其中注册请求处理函数
        ProtobufCodecPtr _codec; // protobuf 协议处理器 -- 针对收到的请求数据进行 protobuf 协议处理
        VirtualHost::ptr _virtual_host;
        ConsumerManager::ptr _consumer_manager;
        ConnectionManager::ptr _connection_manager;
        threadpool::ptr _threadpool;
    };
}

#endif /* __M_BROKER_H__ */
